--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Meerwald-dir/wm_kund_e.c	Fri Dec 20 13:08:59 2024 +0100
@@ -0,0 +1,257 @@
+#include "wm.h"
+#include "signature.h"
+#include "wm_dwt.h"
+#include "pgm.h"
+
+char *progname;
+
+void usage(void) {
+  fprintf(stderr, "usage: %s [-e n] [-f n] [-F n] [-h] [-o file] [-q n] [-v n] -s file file\n\n", progname);
+  fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
+  fprintf(stderr, "\t-f n\t\tfilter number\n");
+  fprintf(stderr, "\t-F file\t\tfilter definition file\n");
+  fprintf(stderr, "\t-h\t\tprint usage\n");
+  fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
+  fprintf(stderr, "\t-q n\t\tquantization/quality factor\n");
+  fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
+  fprintf(stderr, "\t-v n\t\tverbosity level\n");
+  exit(0);
+}
+
+int main(int argc, char *argv[]) {
+
+  FILE *in = stdin;
+  FILE *out = stdout;
+  FILE *sig = NULL;
+
+  char output_name[MAXPATHLEN] = "(stdout)";
+  char input_name[MAXPATHLEN] = "(stdin)";
+  char signature_name[MAXPATHLEN];
+
+  int c;
+  int row, col;
+
+  int n;
+
+  double quality = 0.0;
+
+  int filter = 0;
+  int method = -1;
+  int level = 0;
+  char filter_name[MAXPATHLEN] = "";
+
+  int seed;
+  int verbose = 0;
+
+  gray **image;
+  Image_tree dwts;
+
+  gray maxval;
+  int rows, cols, colors, format;
+
+  progname = argv[0];
+
+  pgm_init(&argc, argv);
+
+#ifdef __EMX__
+  _fsetmode(in, "b");
+  _fsetmode(out, "b");
+#endif
+
+  while ((c = getopt(argc, argv, "e:f:F:h?l:o:q:s:v:")) != EOF) {
+    switch (c) {
+      case 'e':
+        method = atoi(optarg);
+        if (method < 0) {
+          fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
+          exit(1);
+        }
+        break;
+      case 'f':
+        filter = atoi(optarg);
+        if (filter <= 0) {
+          fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
+          exit(1);
+        }
+        break;
+      case 'F':
+        strcpy(filter_name, optarg);
+        break;
+      case 'h':
+      case '?':
+        usage();
+        break;
+      case 'l':
+        level = atoi(optarg);
+        if (level < 1) {
+          fprintf(stderr, "%s: embedding level out of range\n", progname);
+          exit(1);
+        }
+        break;       
+      case 'o':
+        if ((out = fopen(optarg, "wb")) == NULL) {
+          fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
+          exit(1);
+        }
+        strcpy(output_name, optarg);
+        break;
+      case 'q':
+        quality = atoi(optarg);
+        if (quality <= 0) {
+          fprintf(stderr, "%s: quality factor %d out of range\n", progname, quality);
+          exit(1);
+        }
+        break;
+      case 's':
+        if ((sig = fopen(optarg, "r")) == NULL) {
+          fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
+          exit(1);
+        }
+        strcpy(signature_name, optarg);
+        break;
+      case 'v':
+        verbose = atoi(optarg);
+        if (verbose < 0) {
+          fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
+          exit(1);
+        }
+        break;
+    }
+  }
+
+  argc -= optind;
+  argv += optind;
+
+  if (argc > 1) {
+    usage();
+    exit(1);
+  }
+
+  if (argc == 1 && *argv[0] != '-')
+    if ((in = fopen(argv[0], "rb")) == NULL) {
+      fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
+      exit(1);
+    }
+    else
+      strcpy(input_name, argv[0]);
+
+  if (sig) {
+    char line[32];
+    fgets(line, sizeof(line), sig);
+    if (strspn(line, "KDSG") >= 4) {
+      fscanf(sig, "%d\n", &n);
+      if (quality == 0.0)
+        fscanf(sig, "%lf\n", &quality);
+      else
+        fscanf(sig, "%*f\n");
+      if (method < 0)
+        fscanf(sig, "%d\n", &method);
+      else
+        fscanf(sig, "%*d\n");
+      if (filter == 0)
+        fscanf(sig, "%d\n", &filter);
+      else
+        fscanf(sig, "%*d\n");
+      if (!strcmp(filter_name, ""))
+        fscanf(sig, "%[^\n\r]\n", filter_name);
+      else
+        fscanf(sig, "%*[^\n\r]\n");
+      if (level == 0)
+        fscanf(sig, "%d\n", &level);
+      else
+        fscanf(sig, "%*d\n");
+      fscanf(sig, "%d\n", &seed);
+      srandom(seed);
+      n_signature = NBITSTOBYTES(nbit_signature);
+      fread(signature, sizeof(char), n_signature, sig);
+      fscanf(sig, "\n");
+    }
+    else {
+      fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
+      exit(1);
+    }
+    fclose(sig);
+  }
+  else {
+    fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
+    exit(1);
+  }
+
+  pgm_readpgminit(in, &cols, &rows, &maxval, &format);
+
+  image = pgm_allocarray(cols, rows);
+
+  for (row = 0; row < rows; row++)
+    pgm_readpgmrow(in, image[row], cols, maxval, format);
+
+  fclose(in);
+
+  // check watermark dimensions and decomposition level
+
+
+  // decomposition of image
+  init_dwt(cols, rows, filter_name, filter, level, method);
+#ifdef POLLEN_STUFF
+  {
+    double alpha, beta;
+    char *alpha_str = getenv("POLLEN_ALPHA"), *beta_str = getenv("POLLEN_BETA");
+    
+    if (alpha_str && beta_str) {
+      alpha = atof(alpha_str);  
+      beta = atof(beta_str);
+     
+      if (alpha < -M_PI || alpha >= M_PI) {
+        fprintf(stderr, "%s: pollen - alpha %f out of range\n", progname, alpha);
+        exit(1);
+      }
+      
+      if (beta < -M_PI || beta >= M_PI) {
+        fprintf(stderr, "%s: pollen - beta %f out of range\n", progname, beta);
+        exit(1);
+      }
+      
+      if (verbose > 7)
+        fprintf(stderr, "%s: pollen - alpha %f, beta %f\n", progname, alpha, beta);
+      
+      dwt_pollen_filter(alpha, beta);
+    }
+  }
+#endif
+
+  dwts = fdwt(image);
+
+  // create 'image' from binary watermark 
+
+  // decomposition of watermark
+  init_dwt(cols, rows, filter_name, filter, 1, method);
+//  dwts = fdwt(watermark);
+
+  // calculate mean value of image and set alpha
+
+  // setup of contrast sensitivity matrix 
+
+  // segment detail images at each level
+
+  // calculate DFT of each segment
+
+  // compute salience for each segment
+
+  // calculate gamma or each detail image
+
+  // embed watermark
+
+  // reconstruction of watermarked image
+
+  idwt(dwts, image);
+
+  pgm_writepgminit(out, cols, rows, maxval, 0);
+
+  for (row = 0; row < rows; row++)
+    pgm_writepgmrow(out, image[row], cols, maxval, 0);
+
+  fclose(out);
+
+  pgm_freearray(image, rows);
+
+  exit(0);
+}